Alloy.



UNllTEl) %TATE% PATEN JOHN T. DWYER, OF ST. LOUIS, MISSOURI.

ALLOY.

No Drawing.

To all whom it may concern Be it lmowii that I, JOHN T. DWYER, a citizen of the United States of America, a resident of the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Alloys, of which the following is a full, clear, and exact description.

My invention relates to an alloy more par ticularly intended for use in the product on of type, the invention having for its ob ect to produce a type metal at less cost than the type metal heretofore in use, and one which is denser and will fiow more freely than the usual type metals.

As is well known, the ordinary type metal is an alloy of tin, lead and antimony with a small percentage of copper. A. large percentage of the cost of type metal alloy is due to the use of tin, and, obviously, if the tin were dispensed with and another agent used at a less expense than incurred by the use of tin, the cost of producing the alloy would be lessened. By my improvement am enabled to dispense with the use of tin and manufacture a highly satisfactory type of metal alloy, this result being accomplished by combining a small percentageof phosphorus with lead and antlmony in lieu of the tin commonly employed, the phosphorus being included in the composition at a much reduced expense as compared with the expense of using tin. For example, I have found it possible by my improvement to produce a meritorious type-metal alloy at a saving of frofour cents to 81X cents per pound.

I .am aware that there is a wide range within which the ingredients of my typev metal alloy maybe utilized to produce a commercially practical type metal, and I, therefore, do not wish to be hmlted to any particular proportions. For instance, it possible to produce a satlsfactory composition by using one one-thousandth of 1% to five one-hundredths of 1% phosphorus in conjunction with from 60% to 90% of lead and 10% to 40% of antimony. However, I

Specification of Letters Patent.

Application filed July 26, 1916. Serial No. 111,417.

may give as a specific example for satisfactory results the following proportions: Antimony 12%, phosphorus two one-bundredths of 1%, balance lead.

In manufacturing my new type metal alloy, I preferably follow a method involving first the reduction of the lead to a molten condition, and then adding the antimony to the molten lead and thoroughly mixingthese ingredients. After the lead and antimony have been thoroughly mixed, I add the phosphorus, doing so, preferably, by the use of an ordinary phosphorizer of the kind commonly used in phosphorizing copper. The phosphorus may, however, be yellow phosphorus and be combined with the other metals by any desired procedure. After the phosphorus has been introduced it is only necessary to stir or, agitate the mass until the phosphorus has been thoroughly melted, and when this point is reached, the molten metal is ready to be poured into molds.

The herein described alloy is not only such that it may be produced at a much less cost than ordinary type metal and will flow more freely, but it is also of such nature that more solid or denser and smoother type may be produced by its use; furthermore, the use of the phosphorus with the other ingredients avoids oxidation with resultant lessening of amount of dross as compared with that produced in the manufacture of type metals as heretofore made.

While the proportions of the ingredients in my alloy may vary widely as hereinbefore indicated I may state that satisfactory composition will not be produced if a greater proportion of antimony than of lead enters into the composition, or if a greater proportion of phosphorus than antimony enters into "antimony and the amount of antimony must be greater than the amount ofphosphorus.

I claim 1. An alloy comprising lead, antimony and phosphorus, in which the amount of lead is greater than the amount of antimony, and the amount of antimony is greater than the amount of phosphorus.

2. An alloy comprising lead, antimony and phosphorus, in which the amount of lead is greater than the amount of antiand eighty-eight per cent. lead.

ninety per cent. lead, ten to forty per cent. antimony and from one one-thousandth to five one-hundreths of one per cent. phosphorus.

4. An alloy composed of the following in: gredients mixed in approximately the .pr0- portions specified twelve per cent. antimony, two hundredths of one per cent. phosphorus JOHN T. DWYER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington,1) 0. 

